Brick-machine



J. CASWELL. I Brick Machine.

No. 32,046. Patented April 16.1861.

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a UNITED STATES PATENT OFFICE.

JOHN QASWELL, OF SYRACUSE, NEW YORK.

BRIGKr-MACHINE.

Specification of Letters Patent No. 82,046, dated April 16, 1861.

To all whom it may concern."

at its central portion to the cross piece B, Be it known that I, JOHN CAswELL, of by suitable bolts. This oblong plate con- Syracuse, in the county ofOnondaga and tains another movable plate A a little State of New York, have invented a new and longer than the piston plate proper, whose 60 useful Improvement in Brick-Machines; and ends form the central portions of the faces of I do hereby declare that the following is a the pistons A, and are alternately extended full, clear, and exact description of the a short distance beyond the same, during Same, reference being had to the accomthe process of filling the molds, so as to cause panying drawings, making part of this specia greater quantity of clay to be deposited 65 1o fication. between the stationary portions of the ends Figure 1, is a vertical longitudinal section of the stationary and movable pistons A of a brick machine, showing the movable than between the extension plates A A of molds and extension plate pistons combined. the same, and thereby give greater solidity Fig. 2, is a top view of the same with the or density to the bricks around the edges 70 upper connected plates of the molds rethan at the central portions. The exten moved. Fig. 3, is a vertical transverse secsion plates A contained in the movable pistion of the same at the line 1, 2, of Fig. 2. tons A and the extension plates A of the Y Similar letters in the several figures refer stationary pistons A, are extended or forced to corresponding parts. outward from the faces of their respective 75 This invention consists in combining with pistons by means of levers D attached by the extension plate pistons, patented by S. screws, which pass loosely through openings Ustick on the 27th day of April 1858, pein the ends of the same, to the movable pisculiarly formed movable molds (for which I ton frame, and at their central portions by have this day made application for Letters similar screws to the extension plates A A 80 Patentof the United States) which molds in such a manner as to cause their opposite are caused to move over, or past, and ill ends, which extend over the side of the such relation to the said pistons, as to draw frame C, to come in contact with pins or off the air from the clay and prevent it from studs E, rising from the upper surface of concentrating at the less dense central porthe side of the frame, at such stages in the 8 30 tion of the same, directly between the eX- movements of the movable piston frame F,

tension plates of the said pistons, as itwould as to force the said extension plates their alotherwise have a tendency to do. lotted distance into the molds M, before the To enable others skilled in the art to make clay is filled in the same, and produce the and use my invention, I will proceed to debefore-mentioned result in the relative quan- 90 scribe its construction and operation. tities at the center and around the edges of The several parts of the brick machine the molds. Such being the case, there will represented in the drawings (with the exbe during the pressure of the clay a strong ception of the extension plates in the pistendency to concentrate the air contained in tons) are made and operatedprecisely simithe same at the central portion, on account 9 lar to the corresponding parts represented of the greater proportionate density around and described in my application for a patthe edges. The movable molds M, prevent ent, before referred to, and need not therethis by drawing the air from the clay during fore be further described. A the whole closing or pressing movements of This specification will be confined to a the pistons A, A, for during these move- 100 description of the construction and operaments of the pistons, the movements of the tion of Usticks piston extension plates, and molds with them, and past the clay, at an such extracts from the description of the opincreased speed, will cause the inner sureration of the movable molds contained in faces of the molds to draw upon, and flatten the specification of my other application as the particles of air forced toward and 105 will be deemed necessary. against the same, through the clay, during 4 The stationary pistons A, are secured to the gradual pressure of the same, and will the cross piece B, of the frame C, and con thus, through the natural tendency of the sist simply of a hollow, smoothly planed flattened particles of air to adhere to. and

oblong plate A, exactly corresponding in move with the smooth mold surfaces sliding 110 p cross section with the size and form of the past the surfaces of the clay, cause the said flat surfaces of the bricks, and firmly secured air to be discharged therefrom.

It will thus be seen, that as soon as the pistons commence to fpress or close upon the clay, the movement 0 the molds Will tend to open the pores of the same (to use an illustrative term) next the surfaces of the said molds, and Will thus produce outlets through Which the air from the center can be drawn, or admitted to escape.

WVhat I claim as new and desire to secure by Letters Patent is Combining with the extension plate pistons, movable molds, continuously operating as described for expelling theair from the clay during the operation of-pressing the same, and preventing it from concentrating 15 in the central portion of the clay lying immediately between the extension plates of the stationary and movable pistons, as herein fully set forth.

JOHN CASWELL.

Vitnesses E. MAHER, C. D. EASTON. 

